Clamping device for coil springs



Dec. 16, 1941. J: TUISKU CLAMPING DEVICE FDR COIL SPRINGS Filed Jan. 3, 1941 WITN E55 Jan 725x19 Kw jfmw.

ATTO R N EYs Patented Dec. 16, 1941 NT orric CLAMPING DEVICE FOR Con. SPRINGS John Tuisku, Eureka, Calif. Application January 3, 1941, Serial No. 373,040

1 Claim.

This invention relates to clamping devices, and its general object is to provide a device that is primarily designed for holding a coil spring of a clock mechanism or the like in wound or contracted condition, to not only materially facilitate handling the spring when assembling or repairing the mechanism, but also to eliminate damaging the same, as well as other parts of the mechanism, and injury to the person, which frequently results from the instant and complete expansion of a released spring.

A further object is to provide a clamping device for the purpose set forth, that can be easily and expeditiously applied and removed with respect to a spring when the latter is in place in its mechanism, but casual removal or displacement of the device when in applied position is practically impossible.

Another object is to provide a clamping device that is simple in construction in that it includes only three parts, and is inexpensive to manufacture, as well as extremely efiicient in operation, use and service.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawing and specifically pointed out in the appended claim.

In describing the invention in detail, reference will be had to the accompanying drawing wherein like characters denote like or corresponding parts throughout the several views, and in which:

Figure 1 is a view illustrating my device applied to a spring of a clock mechanism.

Figure 2 is a side view of the device per se, with the adjustable jaw member or clamping block in section.

Figure 3 is a bottom plan view.

Figure 4 is a perspective view of the adjustable jaw member.

Referring to the drawing in detail, it will be noted that I have illustrated my device as being clamped to a main spring A of a clock mechanism B, but it will be obvious that it can be used on springs for all types of spring motors and the like, as such springs are substantially similar to that shown.

The device includes two entirely differently constructed jaw members, indicated respectively by the reference numerals I and 2. The jaw member I is of substantially semi-circular or arcuate formation for disposal about a spring,

and is relatively thin, as well as has a beveled 55 free end 3 to facilitate its passage between the parts f the mechanism, for application and removal with respect to the spring, as will be apparent upon inspection of Figure 1.

Formed on the opposite end of the arcuate jaw member I is a threaded shank 3' extending outwardly therefrom at right angles thereto, and mounted for slidable movement on the shank for adjustment with respect to the gripping or spring engaging portion 4 of the jaw member I, is the jaw member 2, the latter being in the form of a block of substantially rectangular formation and recessed as at 5 from its inner end and under face for a portion of its length with the recess communicating with a bore 6 extending centrally through the remaining portion, to provide a collar portion 1 through which extends the shank, while the portion of the jaw member I adjacent to the shank extends through the recess for sliding engagement with the side walls thereof to prevent rotation of the jaw member I relative to the jaw member 2, as will be apparent upon inspection of Figure 2.

The jaw member 2 is tapered inwardly from its inner end to its outer end and both ends are flat. The inner end provides a spring bearing face 8 for cooperation with the gripping portion 4 of the jaw member I to set up a clamping 1 action against the spring, while the outer end provides a bearing face 9 for a wing nut ID that is threaded on the shank for moving and holding the jaw member 2 in clamping association with the gripping portion 4, and the latter may have its inner face transversely flattened to follow the shape of the spring.

From the above description and the disclosure in the drawing, it will be obvious that the device is associated with a spring, by disposing the jaw member I about the spring as shown in Figure 1, thence the jaw member 2 is moved toward the spring by the wing nut Ill, for cooperation of the member 2 with the jaw portion 4 to set up a clamping engagement upon opposite sides of the spring to hold the latter in contracted condition, against any possibility of being released, so that it can be readily handled as previously set forth.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in the constructlon and in the combination and arrangement of the several parts, provided that such changes fall withinthe scope of the appended claim.

like jaw member with respect to the first jaw member, said block like jaw member being recessed from its inner and under faces for a portion of its length, said recess communicating with said base, the first jaw member having that portion thereof adjacent to and at right angles to said shank mounted in the recess to prevent rotation of said first jaw member relative to the block like jaw member, and a wing nut threaded on the shank for moving and holding the block like jaw member relative to the opposite end portion of the first jaw member for cooperation therewith to set up a clamping engagement with the opposite sides of the spring.

JOHN TUISKU. 

